Here we are comparing two cameras with different body types: Pentax K-S2 is a Entry-Level DSLR camera with a 20.0MP APS-C sensor whereas Sony A7 II is a Pro Mirrorless camera with a 24.0MP Full frame sensor. Despite some fundamental differences of these two body types, Mirrorless cameras are becoming serious altenatives to DSLR cameras thanks to their size/weight advantages and recent improvements in their focus speeds , which makes this comparison even more interesting. Fortunately, you can't go wrong with any of these cameras as we rank them amongst Top 10 cameras in their classes. Pentax K-S2 is ranked #1 out of 75 Entry-Level DSLR cameras with an overall score of 84 whereas Sony A7 II is ranked #8 out of 30 Pro Mirrorless cameras with an overall score of 89.

Let's have a brief look at the main features of Pentax K-S2 and Sony A7 II before getting into our more detailed comparison.

Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Sony A7 II is 79g lighter than the Pentax K-S2 but we don't think this will make a significant difference.

Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you have to also take into account the lenses that you will be using with these bodies. Since Sony A7 II has a Full frame sensor and Pentax K-S2 has a smaller APS-C sensor, Pentax K-S2's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A7 II lenses.

Another difference between these two cameras is that Pentax K-S2's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moire occurring in certain scenes.

Below you can see the K-S2 and A7 II sensor size comparison.

As seen above, Sony A7 II has a 2.3x Larger sensor area than Pentax K-S2. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.

What types of Photography are Pentax K-S2 and Sony A7 II Good for?

In this section, we rank and compare Pentax K-S2 and Sony A7 II for five different photography types in order to make your decision process easier in case you are specifically interested in one or more of these areas.

Number of available lenses is a big decision factor while choosing your interchangeable lens camera. When we look at the available lenses for these two cameras, we see that Pentax K-S2 has an advantage over Sony A7 II. There are 143 lenses for Pentax K-S2's Pentax KAF2 mount, on the other hand there are only 73 lenses for Sony A7 II's Sony E (NEX) lens mount.

Another important factor is the availability of image stabilization. Both Pentax K-S2 and Sony A7 II has Sensor based Image stabilization which means that all the lenses will be stabilized in these bodies.

You may have already made your decision about which camera suits better for your needs and your budget so far but in case you wonder how we rated Pentax K-S2 and Sony A7 II, below you can find their scores in five different aspects.
Our Decision Algorithm dynamically scores cameras using 63 different specs, current price and DxO Mark scores (where possible) in order to make a more objective and consistent comparison.

Here is a summary of how Pentax K-S2 and Sony A7 II scores compare:

Pentax K-S2

Imaging

Features

Value

Portability

Overall

Ranked #1 out of 73 in Compact SLR camerasRanked #40 out of 1131 in all Cameras

Sony A7 II

Imaging

Features

Value

Portability

Overall

Ranked #8 out of 49 in SLR-style mirrorless camerasRanked #17 out of 1131 in all Cameras

Sony A7 II has a higher Overall Score than the Pentax K-S2 and would be our choice if we have to decide between these two cameras.